When your tongue becomes too spicy for you to bear, it’s time to quit the jalapeño eating contest. You’ve been eating them for three hours now and the spiciness from the peppers is really burning your tongue. Throw in the towel, it’s time to quit the contest.
This kanji has another meaning too:
Eating isn't the only thing that makes your tongue spicy, so do certain words. Say your favorite words out loud right now. Feel them on your tongue. Words are the spicy food of language!
Oh, you're probably wondering who won that spicy food contest after you quit and became obsessed with words instead. It was Jesus (じ). Who did you expect? He was great with words AND never quitting when things got spicy.
Currently there are no similar looking kanji which exist in the WaniKani learning system